Valve-spring compressor



R. C. COOK VALVE SPRING COMPRESSOR May 25 Filed NOV. 5, 1925 FIG. 2.

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l atented May 25 1926.

UNITED STATES- ROBERT C. COOK, or eosnmv, ivnw YORK.

VALVE-SPRING coMrnEssoR.

Application filed November 5, 1925. Serial No. 67,089.

This inventionrelates to new and useful improvements in valve-spring compressors. The primary object of the invention is to provide means for easily compressing the springs for overhead valves in an explosive engine so that the pins or other spring holding means may valve stems.

A further object of the invention is to provide means for preventing slippage of the cylinder head while the springs are being compressed.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure ly broken away, pressor embodying trated in its operative position in respect be removed from the of the valve-spring comto the intake and exhaust valves of a cylinder, the said valves being illustrated in elevation while the cylinder head carrying the same is shown partly in elevation and partly in vertical section;

Fig. 2 is a side elevational view of the compressorembodying this invention;

Fig. 3 is a fragmentary horizontal sectional view taken upon line III- 111 of Fig.2; and

Fig. 4 is a horizontal sectional-view taken upon line IVIV of Fig. 2. y

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of this invention, the numeral 5 designates the base portion of a substantially U-shaped frame which .constitutes the body portion of this compressor. This frame further includes an upright 6 which carries at its upper end alaterally projecting arm 7 extending in parallelism with the base 5, but being of reduced length in respect to the same. v

The base portion 5 has an aperture 8 formed therein which is intended to receive the pin 9 of a disk member 10 which is intended to be removably positioned upon the base portion 5 by the insertion of its pin 9 in the base portion aperture 8. The arm 7 has an enlarged end 11 which is formed with a vertically extending hole 12 that is internally screw-threaded. Mounted within this hole 12 is a threaded post 13 that is 1 is a front elevational view, part this invention and illusprovided with an actuating bar 14 at its upper end. Suitably connected to the lower end of the post 13 is a horizontally elongated member or head 15 which is provided with apertures 16 located on opposite sides of the post 13-, the lower edges of the apertures being rabbetedat 16, as illustrated.

Fig. 1 shows this valve compressor in operation. The compressor may be mounted upon a bench or work-table17 in any desired manner, as by securing means passing through the base portion 5 of the U- shaped frame. This compressor is intended to be used in connection with overhead valves which are removed with the cylinder head 18 when the latter is disconnected from the cylinder block for the purpose of permitting the valves to be ground. The sectioned portion of this cylinder head 18 clearly illustrates the valves 19 with their heads 20 properly seated.- The pocket or depression 21 forms the extreme outer end of the combustion chamber supplied with fuel and exhausted by the valves 19. The disk 10 is intended to project into this pocket 21 for engaging the heads 20 of the valves 19 to prevent movement of the same while the valve springs 22 are being compressed. This head will also prevent slippage of the cylinder head 18 during the compressing operation. It is to be understood that many different sized disks 10 'may be provided so that the one employed will properly fit the pocket 21 of the particular type of cylinder head being operated upon. The elongated plate or head 15 will be moved downwardly in respect to the valve stems 28 until the latter pass through the apertures 16 of thehead 15 and the rabbeted edges of these apertures receive the washers Further movement of the head 15 will then start compressing the springs 22 and these springs may be compressed until the pins 25 may be to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the'invention'or the scope of the subjoined claim.

Having thus described the invention, I claim In a valve-spring compressor, a frame inc to engage the springs when the valve stems are extending through the apertures, and 1 a feed screw connected to the elongated body and the arm of the frame and functioning to actuate the body for compressing the valve springs.

In testimony whereof I affix my signature.

ROBERT C. COOK. 

